Snakeoil

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- 'dumb' terminfo is no longer tempted- to useless to hack around it.

- get_formatters now properly falls back to plain text formatting if no
terminfo could be found.

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- overhauls to 2to3k support; speedup caching by near 16% via moving it into
the process rather then as an external invocation. Additionally fork the
workers off to of cpus on the system for parallelization when the results
aren't cached.

- force -fno-strict-aliasing to be appended when it's invalidly left out by
distutils internals. See issue 969718 in pythons tracker.
If you're using a non gcc compiler, you'll need to pass
--disable-distutils-flag-fixing to disable the -fno-strict-aliasing
additions.

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- Licensing changes- see COPYING for specifics. Majority of snakeoil
is now GPL2/BSD 3 clause w/ a few exemptions.

- minor cleanup to extensions for GC support and stricter gcc.

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- add a cpy extension for jit_attr functionality; this brings the
overhead down to effectively background noise for most usages.

- add a reflective_hash class to snakeoil.klass; this is primarily used
for when the has is precomputed and stored somewhere.

- add an extension for ProtectedSet.__contains__; this levels a nice
speedup for pcheck scans.

- enable a set of extensions for slots backed mappings; primarily affects
pkgcore cache data objects, end result being pquery against a full
repo in raw mode is about 8% faster overall.

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- snakeoil.struct_compat module was added; provides py2.4 compat, and
adds read/write methods that take an fd and operate as unpack/pack
against that fd. This simplifies invocation/stream access primarily.

- add test_slot_shadowing; basically looks for __slots__ usage where
a derivative class adds slotting the parent already provides, thus
leading to a very unfun set of bugs and wasted memory.

- fix test_demandload_usage to properly recurse...

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- add compatibility.is_py3k_like for marking if it's >=py2.7, or py3k